Journal of the Society for Psychical Research, 1908 e-bog

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. There, I believe, was the mistake. The percipient, knowing beforehand that a given number of letters or notes would be sent, could not but try to guess, his mind entering into action, and that would, of course, prevent him from giving his undivided attention to the message sent. The percipient's mind must remain in a passive state, and his inward vision a perfect blank, in a state of expectation.